What a meeting calls a camera or screen that has no name of its own: "a participant's camera", "a participant's
screen". A meeting's bridge engine gives it to a source its driver gave no label, and the LiveKit bridge to a source
whose person has no display name, so the model reads the same name from either. A call doesn't need it: each of its
sources has a label.
Parameters
kind: "camera"|"screen"
Whether the source is a person's camera or a screen they share.
What a meeting calls a camera or screen that has no name of its own: "a participant's camera", "a participant's screen". A meeting's bridge engine gives it to a source its driver gave no label, and the LiveKit bridge to a source whose person has no display name, so the model reads the same name from either. A call doesn't need it: each of its sources has a label.